Make sure running works as intended with Grunt 1

There are some awesome improvements coming soon, we should make sure they work as intended.
http://gruntjs.com/blog/2016-02-11-grunt-1.0.0-rc1-released

The main part i'm worried about is using grunt without grunt cli but this in `package.json`

``` json
"scripts": {
"grunt": "grunt"
}
```

Start with the package.json script shown in the issue and review the Grunt 1.0.0-rc1 announcement. Verify whether the Atom package can run Grunt tasks without grunt-cli; done means the documented script works as intended with Grunt 1.

Written by the indexing model from the issue text.